As I understand sinkholes, the Florida underground is porous limestone covered by sand. There is the aquifer under the limestone. When the groundwater goes away either from extreme drought or from too much demand on it from excessive building, there are pockets of the limestone that were caves under water and they collapse on themselves. The product is a sinkhole if it occurs gradually or a catatrophic ground collapse if it occurs suddenly.
There have been sinkholes and ground collapses around Orlando, Ocala, The Villages, and other populated areas of Central Florida.
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